<template>
  <view>
    <view class="goods-item">
      <!-- 商品左侧图片区域 -->
      <view class="goods-item-left">
        <!-- 存储在购物车中的商品，包含 goods_state 属性，表示商品的勾选状态 -->
        <radio
          :checked="goods.goods_state"
          color="#C00000"
          v-if="showRadio"
          @click="radioClickHandler"
        ></radio>
        <image
          :src="goods.goods_small_logo || defaultPic"
          class="goods-pic"
        ></image>
      </view>
      <!-- 商品右侧信息区域 -->
      <view class="goods-item-right">
        <!-- 商品标题 -->
        <view class="goods-name">{{ goods.goods_name }}</view>
        <view class="goods-info-box">
          <!-- 商品价格 -->
          <view class="goods-price">￥{{ goods.goods_price | tofixed }}</view>
          <uni-number-box
            :min="1"
            :value="goods.goods_count"
            v-if="showNum"
            @change="numChangeHandler"
          ></uni-number-box>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
export default {
  // 定义 props 属性，用来接收外界传递到当前组件的数据
  props: {
    // 商品的信息对象
    goods: {
      type: Object,
      defaul: {},
    },
    // 是否展示 radio 组件
    showRadio: {
      type: Boolean,
      defaul: false,
    },
    // 是否展示价格右侧的 NumberBox 组件
    showNum: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      // 默认的空图片
      defaultPic:
        "https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png",
    };
  },
  methods: {
    radioClickHandler() {
      this.$emit("radio-change", {
        // 商品的 Id
        goods_id: this.goods.goods_id,
        // 商品最新的勾选状态
        goods_state: !this.goods.goods_state,
      });
    },

    numChangeHandler(val) {
      this.$emit("num-change", {
        // 商品的 Id
        goods_id: this.goods.goods_id,
        goods_count: +val,
      });
    },
  },
  filters: {
    // 把数字处理为带两位小数点的数字
    tofixed(num) {
      return Number(num).toFixed(2);
    },
  },
};
</script>

<style lang="scss">
.goods-item {
  // 让 goods-item 项占满整个屏幕的宽度
  width: 750rpx;
  // 设置盒模型为 border-box
  box-sizing: border-box;
  display: flex;
  padding: 10px 5px;
  border-bottom: 1px solid #f0f0f0;

  .goods-item-left {
    margin-right: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;

    .goods-pic {
      width: 100px;
      height: 100px;
      display: block;
    }
  }

  .goods-item-right {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: space-between;

    .goods-name {
      font-size: 13px;
    }

    .goods-info-box {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .goods-price {
      font-size: 16px;
      color: #c00000;
    }
  }
}
</style>
